A139682 - OEIS

%I #8 May 08 2020 18:24:44

%S 1,2,8,64,1024,32768,2097152,254409765,52635426489,16734894319214,

%T 7584366191600668,4658699927786935270,3743721825782942609558,

%U 3832881704712490758507152,4895883231714885655148797216,7669344273849107780888127116263,14522102432152504473007144076157867

%N Number of n X n symmetric binary matrices with no row sum greater than 6.

%H Andrew Howroyd, <a href="/A139682/b139682.txt">Table of n, a(n) for n = 0..25</a>

%Y Column k=6 of A334548.

%K nonn

%O 0,2

%A _R. H. Hardin_, Jun 13 2008